Portable planer or like tool



G. L. KRABER.

PORTABLE PLANER 0H LIKE TOOL.

APPLlcAnoN'mED ses. 15192K.

Patented Apr. 11, 1922.

Slm/umm THE; CLEVELAND INDUSTRIAL,DEVELOPMENT eoivrnanr, orcLnvnLANnemO,

A conr'ona'rron or onto.

' ronfrannn :PLANER oa LIKE 'reen Specification of Letters lartent.V Patntd ,API-. 11i, 1922 Application filed February 12, 1921. Serial No. 444,543.

Tri-all whom it may concern.'

Be it known that I, GEORGE L. KRABER, a citizen of the United States, anda resident of Lakewood, county of Cuyahoga,` and State of Ohio, have invented a new and useful Improvement in Portable Planers or like Tools, of which the following is a specification, the principle of the invention being herein explained, and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The resent improvements, relating, as indicatec to portable planers or like tools, have more particular regard to tools ofy this class intended tobe driven by fluid ,operated turbine engines'of the'sort'shown and described,

for example, infU. S;l PatentvNo. 1,283,423, dated October29,-191S, to T. W. Paxton. A portable planer-'similarly drivenfor'ms the Subj ect matter of my c'o-p'ending .application filed October 7, 1918, Serial No. 257,254, and the present invention may be regarded in part as animprovementupon such planer, one object beingl to4 provide' animproved construction yof bearings'for. the spindle of the rotor which constitutes the driving element, and for'the lubrication of such bearings. Another object is'to provide a `supand particularly point'edout in the' claims,l

porting member for4 thebody of the planer proper, which may lbe more readily adjusted to vary the inclinationrof such rotor spindle, and thus of the axis of the rotary cutter car ried thereby, with respect to the planeof the surface to be worked. j

To the accomplishment ofthe foregoing and related ends the invention, then consists of the means hereinafter fully described the annexedpdrawing' and the following description setting forth inr detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms ing-which the principle of the'inv ention may be used'.

- In said annexed drawing l Fig. 1 is a planV view 0f a portable tool, specifically a planer, embodying'my present improvements; and Fig. 2 is a central ver,- tical section thereof taken on the plane indicated by the line 2 2, Fig. 1. Y Referring to the figures of said drawing,

,y the body of the planer there shown will be seen to comprise two principal elements, a

vlatter after such air has done its work.

plate-like member 1 Vthat forms the base of the body, and a top member 2 of general cir- GEORGE `1.. Ximena, or muxnwoo3D,l oHIo, Assumere BY Mnsirn ASSIGNMENTS, 'ro

cular form-that t's into a circular recess in the upper face of said member 1. Said top member isrecessed on itsunder face so as to provide, in conjunction with a complemen` tary recess in the base member, a chamber in which 1s rotatably mounteda rotor 3 deslgnedto be drivenby compressed air or 'other equivalent ypressure fluid, such rotor being,"for example, of the general type described and shown in the patent referred toY above. The spindle 4, upon which, at an in-V Y termediate point, -'said rotor is attached, is journaledat its-upper end in a ballI bearing 5 mounted centrally in top member 2, while another larger ball vbearing Gis mounted beuildeliside of said top member and a `hub 8 nular chamber 13 formed in the Vside wall ofthe recess in the bottommember 1. A ring la is fitted between the two members 1 land 2 so'as to close off thefinterior face 'of recess 13, save for .-'a series lof openings 15 that are drilled for otherwise formed lin said ring to allow theV air to lescape from thev annular tween a depending'annular fiange 7 on the l chamber thus formed in al seriesofvjets thatv y strikel against the 'periphery of the rotor, in" l Y order to set Vthe latter in moti'onl' Y It will be understood Vthat `by varying ythe number of said jet ol'aeningsV 15 the rate of flow'of the pressure fiuid may be increased or decreased with a corresponding change in-the rate of speed of the rotor.V twill'be observed `(see Fig., 2) tha'tthe openings 15 lieadjacent the upper side of the peripheral face of the rotor, and that the'lojwe'r Vedge of the ring 14 is beveled or cut away so as, to allow the air to escape through vopeningsl inbottom member" 1 from theJ pockets in the periphery of the on said handle, as will be readily understood.

A second handleA 21 is bolted or otherwise suitably attached to the top member 2 opposite said handle l0 so that the operator may grasp the tool with both hands in order to press the same against the work.

Attached to the lower end of rotor spindle 4 is a cutter or knife 22 that has two oppositely disposed laterally projecting blades formed with reversely directed convex cutting edges that lie on opposite sides of said spindle. The specific design of this cutter forms no part of the present invention, being covered by my aforesaid co-pending application, Serial No. 257,254. ln order that `said knife or cutter may be brought into proper relation with the surface being worked, a supporting member for the body of the tool is provided, consisting of a flat shoe oi sole plate 23 formed with a central opening 24 to allow the blades of the cutter to project therethrough as said cutter is rotated. This shoe is pivotally attached at its one end, preferably that adjacent the end of the body to which handle 10 is attached, through the medium of a U-shaped bracket 25 that has its transverse portion riveted to said plate, while its upstanding arms are pivoted on a transverse rod 26 in bottom member 1 of the tool body proper. Attached to the upper face of plate 23 at its opposite end is a vertically disposed screw 27 that has threaded engagement with the interior of a nut 28 that is in Aturn exterior-ly threaded in a suitable aperture in bottom member 1. As a result it will be seen that, upon rotation of said nut in one direction or the other, the adjacent end of the plate 24 will be moved towards or away from said member 1 so as to cause the cutter 22 to project more or less through the opening 24 in said plate, and at the same time vary the angular relation of said plate with respect to the body of the tool, and thus to the axis 4 of the rotor spindle, which likewise constitutes the axis olf the cutter. The screw 27 is preferably attached to the plate 'by means of a trans versc pin 29 held in a slotted bracket 30 on said plate, so as to allow for'necessary swiveling action as well as longitudinal adjust ment of the screw, and thus avoid any binding effect; and in order to retain the screw in adjusted position a'spring-pressed plunger 31 suitably housed in member 1 engages with slots 32 formed in the periphery of nut 28, as will be readily understood.

The upper face of rotor 3 is cut away between the hub 8 and the periphery of said rotor so as to leave an'upstanding flange 35 adjacent the latter, such flange being curved inwardly to bring itsV inner edge a trifle beyond a correspondingly curved Vface 36 on the under side of top member 2 that lies without the depending flange 7 on the latter, torming part of the mounting for ball bearing 6; and a .series of openings 37 extend from the channel thus provided to the interior space above such bearing that immediately surrounds the spindle4. Anannular casing 88, suitably attached to the upper :face'of top member 2, provides a lubricant containing chamber directly over ball bearing 5, and in order to retain the oil or equivalent lubricant in said chamber from flowing too freely downwardly throi-igh said bearing 5, a plurality of flat washers 39 are placed in said chamber. The lower of these washers is preferably formed with a central opening as shown in Fig. 2, Vand the washers are held between two plates 40 and 4l that are movable towards each other so as to eX- pel the oil in said washers, when desired, through an aperture 42 in the lowermost plate. A knob 44 on the upper plate that projects above the housing permits the operator to press said plate downwardly when desired. rlhe oil, after passing through ball bearing 5, will flow under gravity through the lower main bearing 6, and then collect on the upper face of the rotor, as will be evident. The latter of course, when thetool is in operation, travels at a high speed, so that the centrifugal force will cause the oil to flow radially outwardly until the recurved .flange 35 is encountered, with theresultthat the oil, as it flies `oft against the' curved face 36, has sufficient momentum to drive it through the openings 37 again into the space above ball bearing 6. vIn other words, such oil as passes through the bearing 5 is thereafter automatically caused to circulate through ball bearing 6 over and over again. The latter being the principal bearing, danger of overheating is practically eliminated, and the occasional pressing down of knob 45, assuming the oil chamber 38 to have been filled, will keep the bearings of the tool at all times thoroughly .lubricated Other modes of applying the Vprinciple of my invention may be employed instead of the one explained, change being made as regards the mechanism herein' disclosed, prosV vided the means stated by any of the following claims or the equivalent of such stated means be employed.

l therefore particularly point ont and distinctly claim as my invention 1. In a tool of' the character described, the

combination of a chambered body, a bearing in said body, a rotary tool-spindle journaled in said bearing and extending through the chamber in said body, and a member.

mounted on said spindle and lying in such chamber, said member being formed with an inwardly curved flange disposed to collect lubricant after passing through said bearing, the contiguous wall of such chamber being formed to receive such lubricant from such flange and return same to the other side of said bearing.

2. ln a tool of the character described, the

11,412,209 y Y ,g3A

combination of a body recessed to provide a circular chamber, a rotary tool-spindle axially disposed in such chamber, a bearing in said body for said spindle, and a rotor mounted on said spindle and lying in such chamber, said rotor being formed with an inwardly curved flange disposed to collect lubricant after passing through said bearing, the contiguous wall of such chamber being formed to receive such lubricant from such flange and return same to the other side of said bearing.

3. In a tool of the character described, the combination of a body recessed to provide a circular chamber, a rotary tool-spindle axially disposed in such, chamber, spaced bearings in said body for said spindle, said body being formed with radial passages connecting such chamber with the space between saidl bearings, and a rotor mounted` on said spindle below the latter and lying in such chamber, said rotor being formed' with an inwardly curved lia-nge disposed to collect lubricant after passing through the adjacent bearing, the contiguous wall ,of

such chamber being formed to receivesuch lubricant from such flange and return same Vto the other side of Vsaid bearing through such radial passages.

Vl. In a tool of the character described, the combination of a body comprising a base member formed with a circular chamber, and a top member formed with a circular flange depending into such chamber, spaced l bearings in said top member proper and 4such dependingv flange, the latter being formed with radial passages between such bearings, means for' supplying lubricant to such first bearing,V a spindle journaled in said bearings, .and a rotor mounted on the lower end of said spindle and lying in such chamber, said rotor being formed with an inwardly curved flange disposed to collect'Y GEORGE L KRABER.

through such 

